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They roar and gnash (I don't actually know if that's a word) their teeth a lot.
Yes, it is illegal to scare people on the streets. Some people could be choked or even pass away if they can't tolerate it.
It is sometimes used to scare people away
that wont scare her away, it will flatter her.
No they can't because they aren't big enough but they can scare people away.
No, they are used to scare people in a funny way.
To scare away the bad dreams>
Indonesian dances and to scare away spirits
Orianally it was to scare away the Vampires. This is because people beleived in Vampires back then.
The mask
dolphins scare off sharks by fighting them
You can scare them with garlic, jewelry with crosses on them and crosses.